Скачать или смотреть SQL VIEWS + Complex Queries, Cross Joins, Unions, and more! |¦| SQL Tutorial

In SQL, a VIEW is a virtual table. It lets you package a complex query into a single table. We will discuss several queries in increasing difficulty to show how VIEWs can greatly simplify your work. In our examples we will introduce CROSS JOINs, Unions, the CONCAT() function, and the COALESCE() function.

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SQL instructor: Ulka Simone Mohanty (@ulkam on Twitter)
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